Dimensional crossover in spin-orbit-coupled semiconductor nanowires with induced superconducting pairing
Abstract
We show that the topological Majorana modes in nanowires much longer than the superconducting coherence length are adiabatically connected with discrete zero-energy states generically occurring in short nanowires. We demonstrate that these zero-energy crossings can be tuned by an external magnetic field and are protected by the particle-hole symmetry. We study the evolution of the low-energy spectrum and the splitting oscillations as a function of magnetic field, wire length, and chemical potential, manifestly establishing that the low-energy physics of short wires is related to that occurring in long wires. This physics, which represents a hallmark of spinless p-wave superconductivity, can be observed in tunneling conductance measurements.
Cite
@article{arxiv.1208.4136,
title = {Dimensional crossover in spin-orbit-coupled semiconductor nanowires with induced superconducting pairing},
author = {Tudor D. Stanescu and Roman M. Lutchyn and S. Das Sarma},
journal= {arXiv preprint arXiv:1208.4136},
year = {2013}
}
Comments
published version, 7 pages, 7 color figures